AWS support draft

This is a very early version of code that adds possibility to bring up a Kubernetes cluster on AWS. It implements a "happy path" scenario at the moment.
I thought I'd ask for some comments and if this work is needed at all before proceeding with making this code ready for merge.
The route table is never associated with the subnet, which why you had issues resolving FQDNs.

I added this just after creating the route:
`$AWS_CMD associate-route-table --route-table-id $ROUTE_TABLE_ID --subnet-id $SUBNET_ID > /dev/null`